Home / 20,924.57-31,386.86-7,780.25

Finding the Fourth Proportional to 20,924.57, 31,386.86 and 7,780.25

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Solution

The fourth proportional to 20,924.57, 31,386.86 and 7,780.25 is: 11,670.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.57 : 31,386.86 = 7,780.25 : x
  2. Step 2: Convert to fraction form
    20,924.57/31,386.86 = 7,780.25/x
  3. Step 3: Cross multiply
    20,924.57x = 31,386.86 × 7,780.25
  4. Step 4: Simplify right side
    20,924.57x = 244,197,578.61
  5. Step 5: Solve for x
    x = 244,197,578.61/20,924.57
  6. Step 6: Final answer
    x = 11,670.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.